What is the test for finding a defendant guilty beyond a reasonable doubt?

defendant guilty beyond a reasonable doubt. [Citations.] On appeal, we must view the evidence in the light most favorable to the People and must presume in support of the judgment the existence of every fact the trier could reasonably deduce from the evidence. [Citation.]' " (People v. Ochoa (1993) 6 Cal.4th 1199, 1206.)